Portable fitness device



FIG. 1 is a side perspective view of a portable fitness device.

FIG. 2 is a side view of the design for a portable fitness device.

FIG. 3 is a front view of the design for a portable fitness device.

FIG. 4 is a rear view of the design for a portable fitness device.

FIG. 5 is a top view of the design for a portable fitness device; and,

FIG. 6 is a bottom view of the design for a portable fitness device.

The broken lines are for the purpose of illustrating the environment ofthe design only and form no part of the claimed design.

CLAIM The ornamental design for a portable fitness device, as shown anddescribed.